I have Rushes 5 times now and have booked to fish it again in June, the first time I fished it was june 2006, I took 50 fish out up to 35lb over only 5 days fishing and no nights, the average size was about 17/18lb.
June 07 fished the opposite side this time, my mates had my swim from the year before and tore the place to pieces, they took out over 100 fish up to 28lb, his average size was 19lb
I had 33 fish out, the biggest being 29lb, average size was 21/22lb, my mate in the swim beside me had 34 fish out up to 28 and his average was also 21/22lb.
I was there again in Oct 07 and was back in Bluecamp, I had 45 fish out the biggest being 29lb 2oz, average size was again 21/22lb, my mate who was opposite me, him and his wife had close on 100 fish out, biggest being 27lb+ his average was 23lb never seen someone land so many twentys in quick succesion.
I was back there again in Jan this yr for a winter session, I didn't do as well as expected, I only took 20 odd fish out, the biggest being 26lb, average weight about 18lb, my mate opposite me who had done so well in Oct did the same again, he had an excellent week, run after run, with the biggest being 28lb+, there average weight was about 19lb.
All in all this is an excellent water that won't be beaten if you are after runs, the fish are all in tip top condition, they go like mad when you hook into them, the fights are long so expect sore arms, they also like a lot of grub, though this doesn't mean that you won't get on them if you don't take alot of bait.
Hope thats enough info for you? just abit surprised that you book somewhere without finding all this out first
Enjoy your trip.